Sounds like you'll need to reopen that bug or assign the one I opened to them for feedback. The behaviour I documented is not what I'd expect to see as a seasoned Eclipse user, much less a first-time Europa user. It's great that UM now understands that by selecting the OCL feature that the
org.eclipse.emf.ocl plugin has been selected (and therefore the error message goes away). My issue is that 'select required' should just select them for me, without me having to pick them by hand. Isn't that what 'select required' means? ;-)

Anyway, this isn't an EMFT bug as such, but it's affecting your existing and future users, so I'll leave it to you to chase the Platform > Update folks with this issue.